Circle (5)
'circle' is the definition.
(orbiting is a kind of circling)
This is all the clue.
(Other definitions for orbit that I've seen before include "Area of influence - eye socket" , "Circumgyration" , "Sphere of activity" , "astronauts' course" , "Path of a planet or satellite" .)
'circle' is the definition.
(wheel can mean to circle or turn)
This is all the clue.
(Other definitions for wheel that I've seen before include "Circular object (in no need of re-invention!)" , "Move in a circle" , "Cog" , "Potters throw on it" , "Rotating circular frame" .)
'circle' is the definition.
(inner circle is a kind of circle)
This is the entire clue.
(Other definitions for inner that I've seen before include "Interior" , "may not satisfy this man" , "Annulus nearest bull" , "Exclusive to a center" , "Bull's penned in by this" .)
'circle' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for ring that I've seen before include "Circus arena" , "Form circle around" , "Frodo's burden (Tolkien)" , "13's story of a 17" , "Group of criminals maybe" .)